[AUTO](RC): When this unit attacks a vanguard, if you have an «Aqua Force» vanguard, if it is the first battle during that turn, this unit gets [Power]+2000 until end of that battle. At the beginning of the close step of that battle, choose one of your «Aqua Force» rear-guards in the same column as this unit, and exchange its position with this unit. (The orientation of the cards does not change)